A discussion on the two spindles of the diesel generator set used in oil drilling rigs ZHONG Zhi-hong, CHENG Zhi-qiang, LI Bao-sen, JIANG Han Department of Mechanical Research, South Institute of Diesel Engines, both parallel,. At the time.æ• å½–, å½–, è¡ŒåŒåŒ; 碟 在 , ​​,, è’‰ è’‰ è’‰ , , ,, 度 妙 妙 妙 妙, 度 妙 妙 妙 ,, position, spindle axis, shooting, blessing, å¡ å¡ è¯´ 柯 , , , , , , axis. This centering method is also suitable for shaft centering assembly of other machines.
The word diesel engine generator spindle centering step in the diesel generator set for drilling rigs, both the diesel engine and the generator are connected through the elastic pin shaft accessor. However, the elastic pin coupling has the ability to properly compensate for the relative displacement of the two shafts, but if the relative displacement of the axes of the two main shafts of the diesel engine and the generator exceeds the specified value, the unit operates. Not only does it produce severe vibration noise and power loss. But also easy to make electrical appliances apparatus. And parts such as tubing hoses were damaged. And to accelerate the wear of the bearing bearing bolts and the turtle ring. Strict coins can also cause the crankshaft to break. The diesel engine and the engine were installed under the same responsibility as above so that the relative axes of the two spindles were in a relative position. The game depends on the safety 1. The measurement of the two spindles, which is almost full of meaning to the flywheel, only rotates the axis of the generator to detect the true alignment of the axes of the two spindles. The effect is not ideal. This will cause the coupling to fail due to the flat period and affect the quality of the entire system. Therefore, it is very important to master the alignment of the two-spindle axes when installing the diesel generator set.
The offset of the axes of the two spindles To make the two axes of the diesel engine and the generator coaxial, it is necessary to first determine the relative positions of the two axes in space. Before adjusting the alignment, you will encounter the following 4 kinds of bits! relationship.
The axes of the two spindles on the same track are completely coincident, that is, they are exactly centered at the two axial ends of the flywheel and the coupling plate in a correct position that is both parallel and concentric.
Different axes, but the axes of the two spindles are parallel. This flywheel is in parallel with the coupling plate but not the same.
On different axes, the axes of the two spindles are not parallel but can intersect at the points. This flywheel is not parallel but concentric with the connecting plate.
Without shafts, the axes of the two upper shafts are neither parallel nor intersecting in space. This flywheel and the connecting plate are not parallel and different.
When two! When the axis is different, the generator axis needs to be adjusted. Until coaxial.
Ruan Zhihong, an engineer, born in 1966, graduated from the Southwest Petroleum Institute in 1989, specializing in mining machinery, now engaged in petroleum machinery design and research work address 434000 Hubei Jingzhou Petroleum Machinery annual two-spindle alignment method diesel engine and generator two spindles The alignment is achieved by aligning the coupling plate and the flywheel so that the coupling plate and the flywheel are both parallel and concentric. When correcting, first fix the diesel engine and generator on the same chassis and then, through the measurement, accurately determine the relative positions of the two axes in space and determine the relative displacement of the two axes. Then increase or decrease the thickness of the spacer bolts of the generator, and move the axis position of the generator shaft to achieve the coaxial axis of the two spindles of the diesel engine and the generator.
In order to eliminate inaccuracies in measurement due to machining and mounting errors of flywheels and coupling discs and other components, and to ensure that the two axes can be centered in a free state, the two axes should be loosely coupled before measurement and the two axes should be rotated when measuring. If the two spindles do not rotate during the measurement, it is necessary to ensure that the components such as the flywheel coupling plate and bushing have high processing and installation accuracy. Otherwise, after the alignment of the flywheel and the coupling plate, the alignment of the two axes cannot be achieved. Although the two axes have been coaxial, when the centering method is used, the two axes cannot rotate, and the axial runout and radial runout will be measured at various positions, resulting in different axes of the two axes. And the radial runout is equal at each position, and the two axes are coaxial, which is consistent with the actual situation.
1 diesel engine shaft; 2 flywheel 3 coupling plate; coupling plate is loosely connected; use the disc brake device to rotate the two main shafts of the diesel engine and the generator, and measure the parallelism and axial clearance of the flywheel and the coupling plate respectively with two thousand minutes. And coaxial radial clearance. Then, using the diesel engine spindle as the reference axis, adjust the position of the stabilizer bolts so that the parallelism and the coaxiality of the flywheel and the coupling disc are within the allowable range.
The two-spindle centering step installs the diesel engine and the generator on the common chassis, first suspends the common chassis on the ground, so that the fulcrums are in uniform contact, and then the diesel engine and the generator are placed on the common chassis.
Place washers, and fasten the diesel engine and generator to the chassis with foot bolts, and put two pins between the coupling plate and the pin hole of the flywheel to loosen the connection.
Measure the axial clearance between the coupling plate and the flywheel and the radial clearance 1 and the contact of 1000mm are respectively perpendicular to the outer edge of the end plate and the radial outer surface of the coupling plate, and adjust the reading of a certain position to zero. . The two-spindle of the diesel engine and the generator are driven by the disc brake device to read and read the readings at the positions of 090180270360, and the maximum axial clearance value, the radial clearance value and the bearing of the thousand revolutions during the rotation of the main shaft are observed. If the two readings in the same position are not equal, the axial movement of the spindle must be eliminated during the measurement until the two readings in the same position are equal. When recording the thousandth reading, take the thousands of contacts when moving in the direction of the disk. Conversely, determine whether the gap is within the specified range. According to the literature 2, the maximum axial clearance value measured by one thousandth of a millimeter is measured by two. When the maximum radial clearance value is 0.3, the two main shafts of the diesel engine and the generator are considered to be coaxial. In fact, due to the load and local heating of the drive system during operation, additional relative displacement of the adjusted coupling occurs. Therefore, when the alignment is performed, the permissible maximum clearances measured for 1 and 2 thousand are to be taken as half of the above-mentioned specified value, that is, 0 is added plus 1 and otherwise the generator shaft must be adjusted.
The amount of generator foot adjustment required to calculate the parallelism between the two spindles is calculated using the example where the axes of the two spindles of the diesel engine and the generator are neither parallel nor intersecting in space. 2, by the similar angular nature, there are 4 generator shafts; 5 magnetic seats; 6 shaft pin 1 with the use of the center, the law should be used to pin the irrigation, and also a batch of Blielie 616 this. 01. The diameter of the measuring part of the D-thickness 1 contact or the outer diameter of the flange of the coupling plate, the thickness of the piece, and the drawing; 1 thousandths of the hour on the hour hand, the position is seen from the end of the generator, the simultaneous reading of the next, 1; 1 thousandth of a point at 6 o'clock in the hour and read it properly, mm, empathy, quantity, move; 1 thousand points 1 at the hour 3 o'clock position of the readout generator to the left or right translation distance, 1;Adjust the generator shaft so that the two spindles loose the generator foot bolts coaxially. The washer with this thickness is added under the 4 foot bolts of the generator. When 0, the thickness of the washer should be reduced by 1; the translation of the generator feet Bolt 1 and, to the right Looking at the distance from the end of the generator to the moving heart When looking at 0, the distance to the heart should be shifted to the left. Then tighten the generator foot bolts.
Check and mark the crankshaft circumference with a stable pin and observe the maximum axial clearance value and the maximum radial clearance value of the two thousand contact points in the rotation of the main shaft. If the clearance value is within the specified range, a stable pin will be marked; Otherwise, repeat the above steps.
Adjust the generator shaft so that the two main shafts loosen the generator foot bolts in parallel, lift the base of the generator with the vertical top wire, and add a washer with a thickness of 1 under the two foot bolts at the foot of the generator. The 7-thick washer should be subtracted; use the horizontal jacking screw to make the support bolt to the right from the end of the generator. Tighten the generator foot bolts.
At this point, the axes of the two spindles are parallel.
Calculating the adjustment amount of the generator feet required for the coaxiality of the two spindles The relative position of the two spindle axes of the diesel generator set for the rig mainly depends on the results of the two-spindle alignment of the diesel generator set in the factory installation process.
When the two spindles are centered, the two spindles must be loosely connected and rotated.
When the two spindles are aligned, the axis of the generator shaft must be adjusted to be parallel to the axis of the diesel engine spindle, and then the two axes must be adjusted to be coaxial so that they can receive both fast and good results.
This centering method is also applicable to the shaft centering assembly of other machines.
1 Liu Tongzhong. The use of diesel generator sets. Beijing Mechanical Industry Publishing 2 Jinan Diesel Engine Factory. 190 series diesel engine use maintenance manual. Jinan Shandong Science and Technology Press, 1994269270 This article edited Liu Feng by turning the device to make two spindles rotate, read a thousand points 2
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